a drug that is available only with written instructions from a doctor or dentist to a pharmacist

Counterpoise generally refers to a factor or force that balances or counteracts another. Typically, it is used in the context of creating equilibrium or stability. It can also refer to the state of being in balance or equilibrium. In engineering, it is used to describe a network of suspended wires or cables, or a weight that balances another weight.

An apportionment by law (of funds, property).